American Optical's Tillyer Executive Lens is a bifocal with a full-width reading segment. It is characterized by absence of 'image jump' between segments.

Digital Commonwealth — Boston Public Library

American Optical's Tillyer Executive Lens is a bifocal with a full-width reading segment. It is characterized by absence of 'image jump' between segments.

[ca. March 1958]

RightsCC0 — Public Domain

CollectionDigital Commonwealth — Boston Public Library

[Information from item housing] Lenses

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